EP2755627B1 - Procédé de préparation d'une composition de soins personnels comprenant un système tensioactif et un composé gras à point de fusion élevé - Google Patents

Procédé de préparation d'une composition de soins personnels comprenant un système tensioactif et un composé gras à point de fusion élevé Download PDF

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Publication number
EP2755627B1
EP2755627B1 EP12769242.4A EP12769242A EP2755627B1 EP 2755627 B1 EP2755627 B1 EP 2755627B1 EP 12769242 A EP12769242 A EP 12769242A EP 2755627 B1 EP2755627 B1 EP 2755627B1
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Prior art keywords
melting point
oil phase
high melting
point fatty
phase
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EP12769242.4A
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German (de)
English (en)
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EP2755627A2 (fr
Inventor
Toshiyuki Okada
Shoko MAEDA
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Procter and Gamble Co
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Procter and Gamble Co
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/34—Alcohols
    • A61K8/342—Alcohols having more than seven atoms in an unbroken chain
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/04—Dispersions; Emulsions
    • A61K8/06—Emulsions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/41—Amines
    • A61K8/416—Quaternary ammonium compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/12—Preparations containing hair conditioners
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof

Definitions

  • the present invention relates to a method of preparing a personal care composition, as defined in the claims.
  • a common preparation method for such composition is emulsification.
  • Such emulsification is conducted by a variety of procedures, by a variety of temperatures, and by a variety of homogenizers.
  • WO 2004/054693 discloses in Example 13, a hair conditioner prepared by the steps: preparing a water phase comprising 46.785% water, 0.3% potassium chloride and 0.1% disodium EDTA at 24-46°C; preparing an oil (emulsion) phase containing 41.785% water, 0.15% distearyl dimonium chloride, 0.84% cetrimonium chloride, and 3.0% cetyl alcohol at 65-88°C; delivering the phases through pipes which join eventually leading into a blending tube which is an antechamber section of a Sonolator®; and homogenizing the blend.
  • WO 2009/158440 relates to a hair conditioning composition containing behenyl trimethyl ammonium methosulfate and having a higher yield point.
  • This publication discloses, at pages 6 and 7, that the composition is preferably substantially free of di-long alkyl cationic surfactants in view of improved wet conditioning benefits.
  • WO 2010/077707 relates to a method of preparing a personal care composition by direct feeding of an oil phase and/or a water phase into a high shear field.
  • This publication also discloses, at page 10, the composition is preferably substantially free of di-long alkyl cationic surfactants in view of improved wet conditioning benefits.
  • compositions with, for example: (i) effective delivery of the conditioning benefits to hair and/or skin, for example, delivery of improved conditioning benefits from the same amount of active ingredients such as surfactants and fatty compounds; (ii) an improved product appearance, i.e., richer, thicker, and/or more concentrated product appearance, and which consumer may feel higher conditioning benefits from its appearance; (iii) homogeneous product appearance which is suitable as products on market; and/or (iv) rheology which is suitable as products on market and/or improved stability of such rheology.
  • the present invention is directed to a method of preparing a personal care composition, wherein the composition comprises: a cationic surfactant system comprising comprising a mono-alkyl quaternised ammonium salt cationic surfactant having one long alkyl chain of from 12 to 30 carbon atoms and a di-alkyl cationic surfactant having two long alkyl chains of from 12 to 30 carbon atoms; a high melting point fatty compound; and an aqueous carrier, wherein the method comprises the steps:
  • the methods of the present invention effectively transform surfactants and fatty compounds to emulsions.
  • mixtures is meant to include a simple combination of materials and any compounds that may result from their combination.
  • the present invention is directed to a method of preparing a personal care composition, wherein the composition comprises: a cationic surfactant system comprising a mono-alkyl quaternized ammonium salt cationic surfactant having one long alkyl chain of from 12 to 30 carbon atoms and a di-alkyl cationic surfactant having two long alkyl chains of from 12 to 30 carbon atoms; a high melting point fatty compound; and an aqueous carrier, wherein the method comprises the steps:
  • the method further comprises the step of adding additional ingredients such as silicone compounds, perfumes, preservatives, polymers, if included, to the emulsion.
  • additional ingredients such as silicone compounds, perfumes, preservatives, polymers, if included, to the emulsion.
  • the emulsion is a gel matrix.
  • the method of the present invention provides improved transformation of surfactants and high melting point fatty compounds to emulsions, i.e., the resulted compositions contain reduced amount of non-emulsified surfactants/high melting point fatty compounds, compared to other methods by which such phases first meet in non- or lower shear field. It is also believed that, by such improved transformation to an emulsion, the method of the present invention provides the resulted composition with improved conditioning benefits, and may also provide them with improved product appearance and/or product stability.
  • direct feeding means, feeding the two phases such that the two phases can reach to the high shear field after first meeting, within 0.52 seconds or less, preferably 0.5 seconds or less, more preferably 0.3 seconds or less, still more preferably 0.1 seconds or less, even more preferably 0 second, in view of improved transformation to emulsions.
  • the direct feeding is preferably conducted by a direct injection.
  • high shear field means that the field has an energy density of from about 1.0x10 2 J/m 3 , preferably from about 1.0x10 3 J/m 3 , more preferably from about 1.0x10 4 J/m 3 in view of improved transformation to emulsions, and to about 5.0x10 8 J/m 3 , preferably to about 2.0x10 7 J/m 3 , more preferably to about 1.0x10 7 J/m 3 .
  • the mixing step (3) comprises the following detailed steps:
  • the mixing step (3) including the detailed steps (3-1) and (3-2) is conducted by using a high shear homogenizer.
  • high shear homogenizers include, for example: high shear homogenizers having a rotating member; and high pressure homogenizers.
  • high shear homogenizers having a rotating member are used, rather than high pressure homogenizers such as Sonolator ® available from Sonic Corporation, Manton Gaulin type homogenizer available from the APV Manton Corporation, and Microfluidizer available from Microfluidics Corporation.
  • Such a high shear homogenizer having a rotating member is believed to: provide more flexibility of manufacturing operation by its two independent operation levers (flow rate and rotating speed) while high pressure homogenizers have only one lever (pressure determined depending on flow rate); and/or require less investment for high pressure.
  • High shear homogenizers having a rotating member useful herein include, for example, direct injection rotor-stator homogenizers such as: Becomix ® available from A. Berents Gmbh&Co. and Lexa-30 available from Indolaval/TetraPac, in view of improved transforming to emulsions.
  • direct injection rotor-stator homogenizers such as: Becomix ® available from A. Berents Gmbh&Co. and Lexa-30 available from Indolaval/TetraPac, in view of improved transforming to emulsions.
  • These direct injection rotor-stator homogenizers are preferred since the two phases can quickly reach to the high shear field after first meeting, compared to other homogenizers having a rotating member, when used as-is.
  • Such other homogenizers having a rotating member include, for example: T. K. pipeline homomixer available from Primix Corporation, and DR-3 available from IKA Corporation.
  • homogenizers having a rotating member might be used with modifications such that the two phases can quickly reach to the high shear field after first meeting.
  • Such other homogenizers having a rotating member when used as-is, may provide an increased amount of high melting point fatty compound crystals which are not transformed into emulsions, in the composition.
  • Other homogenizers, which has a lower energy density, such as that named T. K. pipeline homomixer may also provide such an increased amount of high melting point fatty compound crystals
  • the oil phase has a temperature which is higher than a melting point of the high melting point fatty compounds.
  • the oil phase has a temperature which is higher than a melting point of the oil phase.
  • the oil phase has a temperature of from about 25°C, more preferably from about 40°C, still more preferably from about 50°C, even more preferably from about 55°C, further preferably from about 66°C, and to about 150°C, more preferably to about 95°C, still more preferably to about 90°C, even more preferably to about 85°C, when mixing it with the aqueous phase.
  • the aqueous phase has a temperature which is below the melting point of the high melting point fatty compounds.
  • the aqueous phase has a temperature of from about 10°C, more preferably from about 15°C, still more preferably from about 20°C, and to about 65°C, more preferably to about 55°C, still more preferably to about 52°C, even more preferably to about 48°C, when mixing it with the oil phase.
  • the temperature of the aqueous phase, when mixing it with the oil phase is at least about 5°C lower than, more preferably at least about 10°C lower than the temperature of the oil phase.
  • the temperature of the aqueous phase, when mixing it with the oil phase is from about 2°C to about 60°C lower than, more preferably from about 2°C to about 40°C lower than, still more preferably from about 2°C to about 30°C lower than the melting point of the high melting point fatty compounds.
  • the temperature of the emulsion when formed is from about 10°C to about 40°C, even more preferably from about 20°C to about 37°C, in view of improved rheology consistency and/or stability of emulsion structure.
  • the temperature of the emulsion when formed is from about 2°C to about 60°C lower than, more preferably from about 2°C to about 40°C lower than, still more preferably from about 2°C to about 30°C lower than the melting point of the high melting point fatty compounds.
  • Oil phase comprises the surfactants and the high melting point fatty compounds.
  • the oil phase comprises preferably from about 50% to about 100%, more preferably from about 60% to about 100%, still more preferably from about 70% to about 100% of the surfactants and the high melting point fatty compounds, by weight of the total amount of the surfactants and the high melting point fatty compounds used in the personal care composition, in view of providing the benefits of the present invention.
  • the surfactants and the high melting point fatty compounds are present in the oil phase, with or without other ingredients, at a level by weight of the oil phase of, preferably from about 35% to about 100%, more preferably from about 50% to about 100%, still more preferably from about 60% to about 100%, in view of providing the benefits of the present invention.
  • Oil phase may contain an aqueous carrier such as water and lower alkyl alcohols, and polyhydric alcohols. If included, the level of aqueous carrier in the oil phase is up to about 50%, more preferably up to about 40%, still more preferably up to about 25%, even more preferably up to about 15% by weight of the oil phase, in view of providing the benefits of the present invention. Among the aqueous carrier, it is further preferred to control the level of water in oil phase, such that the level of water in oil phase is preferably up to about 40%, more preferably up to about 25%, still more preferably up to about 15%, even more preferably up to about 10% by weight of the oil phase.
  • the oil phase may be substantially free of water.
  • oil phase being substantially free of water means that: the oil phase is free of water; the oil phase contains no water other than impurities of the ingredients; or, if the oil phase contains water, the level of such water is very low.
  • a total level of such water in the oil phase if included, preferably 1% or less, more preferably 0.5% or less, still more preferably 0.1% or less by weight of the oil phase.
  • Oil phase may contain other ingredients than the surfactants and the high melting point fatty compounds and aqueous carrier.
  • Such other ingredients are, for example, water-insoluble components and/or heat sensitive components, such as water-insoluble silicones, water-insoluble perfumes, water-insoluble preservatives such as parabens and non-heat sensitive preservatives such as benzyl alcohol.
  • water-insoluble components means that the components have a solubility in water at 25°C of below 1g/100g water (excluding 1g/100 water), preferably 0.7g/100g water or less, more preferably 0.5g/100g water or less, still more preferably 0.3g/100g water or less. If included, it is preferred that the level of such other ingredients in the oil phase is up to about 50%, more preferably up to about 40%, by weight of the oil phase, in view of providing the benefits of the present invention.
  • Aqueous phase comprises aqueous carrier.
  • the aqueous phase comprises preferably from about 50% to about 100%, more preferably from about 70% to about 100%, still more preferably from about 90% to about 100%, even more preferably from about 95% to about 100% of aqueous carrier, by weight of the total amount of the aqueous carrier used in the personal care composition, in view of providing the benefits of the present invention.
  • Aqueous carrier is present in the aqueous phase, with or without other ingredients, at a level by weight of the aqueous phase of, from about 50% to about 100%, more preferably from about 70% to about 100%, still more preferably from about 90% to about 100%, even more preferably from about 95% to about 100%, in view of providing the benefits of the present invention.
  • Aqueous phase may contain the surfactants and high melting point fatty compounds. If included, it is preferred that the level of the sum of the surfactants and high melting point fatty compounds in the aqueous phase is up to about 20%, more preferably up to about 10%, still more preferably up to about 7% by weight of the aqueous phase, in view of providing the benefits of the present invention. Even more preferably, the aqueous phase is substantially free of the surfactants and high melting point fatty compounds.
  • aqueous phase being substantially free of the surfactants and high melting point fatty compounds means that: the aqueous phase is free of the surfactants and high melting point fatty compounds; or, if the aqueous phase contains the surfactants and high melting point fatty compounds, the level of such surfactants and high melting point fatty compounds is very low.
  • a total level of such surfactants and high melting point fatty compounds in the aqueous phase if included, preferably 1% or less, more preferably 0.5% or less, still more preferably 0.1% or less by weight of the aqueous phase.
  • Aqueous phase may contain other ingredients than the surfactants and the high melting point fatty compounds and aqueous carrier.
  • Such other ingredients are, for example, water soluble components and/or heat sensitive components, such as water soluble pH adjusters, water soluble preservatives such as phenoxyethanol and Kathon®, and water soluble polymers.
  • water soluble components means that the components have a solubility in water at 25°C of at least 1g/100g water, preferably at least 1.2g/100g water, more preferably at least 1.5g/100g water, still more preferably at least 2.0g/100 water. If included, it is preferred that the level of such other ingredients in the aqueous phase is up to about 20%, more preferably up to about 10% by weight of the aqueous phase, in view of providing the benefits of the present invention.
  • the personal care composition of the present invention comprises a surfactant, high melting point fatty compound, and aqueous carrier.
  • the surfactants, the high melting point fatty compounds, and the aqueous carrier are in the form of emulsion.
  • compositions of the present invention comprise a cationic surfactant system.
  • the cationic surfactant system can be included in the composition at a level from about 0.5%, preferably from about 1%, more preferably from about 1.5%, still more preferably from about 1.8%, still more preferably from about 2.0%, and to about 8%, preferably to about 5%, more preferably to about 4% by weight of the composition, in view of providing the benefits of the present invention.
  • the surfactant is water-insoluble.
  • water-insoluble surfactants means that the surfactants have a solubility in water at 25°C of below 1g/100g water (excluding 1g/100 water), preferably 0.7g/100g water or less, more preferably 0.5g/100g water or less, still more preferably 0.3g/100g water or less.
  • Cationic surfactant system useful herein comprises a mono-alkyl quaternized ammonium salt cationic surfactant and a di-alkyl cationic surfactant. It is believed that such combination of a mono-alkyl quaternized ammonium salt cationic surfactant and a di-alkyl cationic surfactant provides feel of quick rinse and/or feel of easy to spread through hair, compared to single use of mono-alkyl cationic surfactants which have one long alkyl chain which has from 12 to 30 carbon atoms.
  • the weight ratio of the mono-alkyl quaternized ammonium salt cationic surfactant to the di-alkyl cationic surfactant is from about 1:1 to about 10:1, more preferably from about 1.5:1 to about 7:1, still more preferably from about 2:1 to about 5:1, in view of stability in rheology and conditioning benefits.
  • the mono-alkyl quaternized ammonium salt cationic surfactants useful herein are those having one long alkyl chain of preferably from 12 to 30 carbon atoms, more preferably from 16 to 24 carbon atoms, still more preferably from 18 to 22 carbon atoms, in view of conditioning benefits.
  • Such mono-alkyl quaternized ammonium salt cationic surfactants useful herein are, for example, those having the formula (I): wherein one of R 71 , R 72 , R 73 and R 74 is selected from an aliphatic group of from 12 to 30 carbon atoms, more preferably from 16 to 24 carbon atoms, still more preferably from 18 to 22 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 30 carbon atoms; the remainder of R 71 , R 72 , R 73 and R 74 are independently selected from an aliphatic group of from 1 to about 8 carbon atoms, preferably from 1 to 3 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 8 carbon atoms; and X - is a salt-forming anion selected from
  • the aliphatic groups can contain, in addition to carbon and hydrogen atoms, ether linkages, and other groups such as amino groups.
  • the longer chain aliphatic groups e.g., those of about 16 carbons, or higher, can be saturated or unsaturated.
  • one of R 71 , R 72 , R 73 and R 74 is selected from an alkyl group of from 12 to 30 carbon atoms, more preferably from 16 to 24 carbon atoms, still more preferably from 18 to 22 carbon atoms; and the remainder of R 71 , R 72 , R 73 and R 74 are independently selected from CH 3 , C 2 H 5 , C 2 H 4 OH, CH 2 C 6 H 5 , and mixtures thereof.
  • more preferred cationic surfactants are those having a longer alkyl group, i.e., C18-22 alkyl group.
  • Such cationic surfactants include, for example, behenyl trimethyl ammonium chloride, methyl sulfate or ethyl sulfate, and stearyl trimethyl ammonium chloride, methyl sulfate or ethyl sulfate.
  • Di-alkyl cationic surfactant Di-alkyl cationic surfactant
  • Di-alkyl cationic surfactants useful herein are those having two long alkyl chains of from 12 to 30 carbon atoms, more preferably from 16 to 24 carbon atoms, still more preferably from 18 to 22 carbon atoms, including, for example, di-long alkyl quaternized ammonium salts.
  • Such di-alkyl quaternized ammonium salts useful herein are those having the formula (I): wherein two of R 71 , R 72 , R 73 and R 74 are selected from an aliphatic group of from 12 to 30 carbon atoms, preferably from 16 to 24 carbon atoms, more preferably from 18 to 22 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 30 carbon atoms; the remainder of R 71 , R 72 , R 73 and R 74 are independently selected from an aliphatic group of from 1 to about 8 carbon atoms, preferably from 1 to 3 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 8 carbon atoms; and X - is a salt-forming anion selected from the group consisting of halides such as chlor
  • the aliphatic groups can contain, in addition to carbon and hydrogen atoms, ether linkages, and other groups such as amino groups.
  • the longer chain aliphatic groups e.g., those of about 16 carbons, or higher, can be saturated or unsaturated.
  • two of R 71 , R 72 , R 73 and R 74 are selected from an alkyl group of from 12 to 30 carbon atoms, preferably from 16 to 24 carbon atoms, more preferably from 18 to 22 carbon atoms; and the remainder of R 71 , R 72 , R 73 and R 74 are independently selected from CH 3 , C 2 H 5 , C 2 H 4 OH, CH 2 C 6 H 5 , and mixtures thereof.
  • Such preferred di-alkyl cationic surfactants include, for example, dialkyl (14-18) dimethyl ammonium chloride, ditallow alkyl dimethyl ammonium chloride, dihydrogenated tallow alkyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, and dicetyl dimethyl ammonium chloride.
  • the high melting point fatty compound can be included in the composition at a level of from about 0.5%, preferably from about 1.0%, more preferably form about 1.5%, still more preferably from about 2%, even more preferably from about 4%, and to about 15%, preferably to about 10% by weight of the composition, in view of providing the benefits of the present invention.
  • the high melting point fatty compound useful herein have a melting point of 25°C or higher, preferably 40°C or higher, more preferably 45°C or higher, still more preferably 50°C or higher, in view of stability of the emulsion especially the gel matrix.
  • such melting point is up to about 90°C, more preferably up to about 80°C, still more preferably up to about 70°C, even more preferably up to about 65°C, in view of easier manufacturing and easier emulsification.
  • the high melting point fatty compound can be used as a single compound or as a blend or mixture of at least two high melting point fatty compounds. When used as such blend or mixture, the above melting point means the melting point of the blend or mixture.
  • the high melting point fatty compound useful herein is selected from the group consisting of fatty alcohols, fatty acids, fatty alcohol derivatives, fatty acid derivatives, and mixtures thereof. It is understood by the artisan that the compounds disclosed in this section of the specification can in some instances fall into more than one classification, e.g., some fatty alcohol derivatives can also be classified as fatty acid derivatives. However, a given classification is not intended to be a limitation on that particular compound, but is done so for convenience of classification and nomenclature. Further, it is understood by the artisan that, depending on the number and position of double bonds, and length and position of the branches, certain compounds having certain required carbon atoms may have a melting point of less than the above preferred in the present invention. Such compounds of low melting point are not intended to be included in this section. Examples of the high melting point compounds are found in International Cosmetic Ingredient Dictionary, Fifth Edition, 1993, and CTFA Cosmetic Ingredient Handbook, Second Edition, 1992.
  • fatty alcohols are preferably used in the composition of the present invention.
  • the fatty alcohols useful herein are those having from about 14 to about 30 carbon atoms, preferably from about 16 to about 22 carbon atoms. These fatty alcohols are saturated and can be straight or branched chain alcohols.
  • Preferred fatty alcohols include, for example, cetyl alcohol (having a melting point of about 56°C), stearyl alcohol (having a melting point of about 58-59°C), behenyl alcohol (having a melting point of about 71°C), and mixtures thereof. These compounds are known to have the above melting point. However, they often have lower melting points when supplied, since such supplied products are often mixtures of fatty alcohols having alkyl chain length distribution in which the main alkyl chain is cetyl, stearyl or behenyl group. In the present invention, more preferred fatty alcohols are cetyl alcohol, stearyl alcohol and mixtures thereof.
  • high melting point fatty compounds useful herein include: cetyl alcohol, stearyl alcohol, and behenyl alcohol having tradenames KONOL series available from Shin Nihon Rika (Osaka, Japan), and NAA series available from NOF (Tokyo, Japan); pure behenyl alcohol having tradename 1-DOCOSANOL available from WAKO (Osaka, Japan).
  • the emulsion is in the form of a gel matrix.
  • the gel matrix comprises the cationic surfactant system, the high melting point fatty compound, and an aqueous carrier.
  • the gel matrix is suitable for providing various conditioning benefits, such as slippery feel during the application to wet hair and softness and moisturized feel on dry hair.
  • the total amount of the cationic surfactant and the high melting point fatty compound is from about 1.0%, preferably from about 2.0%, more preferably from about 3.0% by weight of the composition, in view of providing the benefits of the present invention, and to about 15%, preferably to about 14%, more preferably to about 13%, still more preferably to about 10% by weight of the composition, in view of spreadability and product appearance.
  • the cationic surfactant and the high melting point fatty compound are contained at a level such that the weight ratio of the cationic surfactant to the high melting point fatty compound is in the range of, preferably from about 1:1 to about 1:10, more preferably from about 1:1 to about 1:4, still more preferably from about 1:2 to about 1:4, in view of providing improved wet conditioning benefits.
  • the composition of the present invention is substantially free of anionic surfactants and anionic polymers, in view of stability of the gel matrix.
  • the composition being substantially free of anionic surfactants and anionic polymers means that: the composition is free of anionic surfactants and anionic polymers; or, if the composition contains anionic surfactants and anionic polymers, the level of such anionic surfactants and anionic polymers is very low.
  • composition of the present invention comprises an aqueous carrier.
  • level and species of the carrier are selected according to the compatibility with other components, and other desired characteristic of the product.
  • the carrier useful in the present invention includes water and water solutions of lower alkyl alcohols and polyhydric alcohols.
  • the lower alkyl alcohols useful herein are monohydric alcohols having 1 to 6 carbons, more preferably ethanol and isopropanol.
  • the polyhydric alcohols useful herein include propylene glycol, hexylene glycol, glycerin, and propane diol.
  • the aqueous carrier is substantially water.
  • Deionized water is preferably used.
  • Water from natural sources including mineral cations can also be used, depending on the desired characteristic of the product.
  • the compositions of the present invention comprise from about 20% to about 99%, preferably from about 30% to about 95%, and more preferably from about 80% to about 90% water.
  • the compositions of the present invention preferably contain a silicone compound. It is believed that the silicone compound can provide smoothness and softness on dry hair.
  • the silicone compounds herein can be used at levels by weight of the composition of preferably from about 0.1% to about 20%, more preferably from about 0.5% to about 10%, still more preferably from about 1% to about 8%.
  • the silicone compounds have an average particle size of from about 1microns to about 50 microns, in the composition.
  • the silicone compounds useful herein, as a single compound, as a blend or mixture of at least two silicone compounds, or as a blend or mixture of at least one silicone compound and at least one solvent, have a viscosity of preferably from about 1,000 to about 2,000,000mPa ⁇ s at 25°C.
  • Suitable silicone fluids include polyalkyl siloxanes, polyaryl siloxanes, polyalkylaryl siloxanes, polyether siloxane copolymers, amino substituted silicones, quaternized silicones, and mixtures thereof. Other nonvolatile silicone compounds having conditioning properties can also be used.
  • Preferred polyalkyl siloxanes include, for example, polydimethylsiloxane, polydiethylsiloxane, and polymethylphenylsiloxane.
  • Polydimethylsiloxane which is also known as dimethicone, is especially preferred.
  • These silicone compounds are available, for example, from the General Electric Company in their Viscasil® and TSF 451 series, and from Dow Corning in their Dow Corning SH200 series.
  • the above polyalkylsiloxanes are available, for example, as a mixture with silicone compounds having a lower viscosity.
  • Such mixtures have a viscosity of preferably from about 1,000mPa ⁇ s to about 100,000mPa ⁇ s, more preferably from about 5,000mPa ⁇ s to about 50,000mPa ⁇ s.
  • Such mixtures preferably comprise: (i) a first silicone having a viscosity of from about 100,000mPa ⁇ s to about 30,000,000mPa ⁇ s at 25°C, preferably from about 100,000mPa ⁇ s to about 20,000,000mPa ⁇ s; and (ii) a second silicone having a viscosity of from about 5mPa ⁇ s to about 10,000mPa ⁇ s at 25°C, preferably from about 5mPa ⁇ s to about 5,000mPa ⁇ s.
  • Such mixtures useful herein include, for example, a blend of dimethicone having a viscosity of 18,000,000mPa ⁇ s and dimethicone having a viscosity of 200mPa ⁇ s available from GE Toshiba, and a blend of dimethicone having a viscosity of 18,000,000mPa ⁇ s and cyclopentasiloxane available from GE Toshiba.
  • the silicone compounds useful herein also include a silicone gum.
  • silicone gum means a polyorganosiloxane material having a viscosity at 25°C of greater than or equal to 1,000,000 centistokes. It is recognized that the silicone gums described herein can also have some overlap with the above-disclosed silicone compounds. This overlap is not intended as a limitation on any of these materials.
  • the "silicone gums” will typically have a mass molecular weight in excess of about 200,000, generally between about 200,000 and about 1,000,000.
  • silicone gums are available, for example, as a mixture with silicone compounds having a lower viscosity.
  • Such mixtures useful herein include, for example, Gum/Cyclomethicone blend available from Shin-Etsu.
  • Silicone compounds useful herein also include amino substituted materials.
  • Preferred aminosilicones include, for example, those which conform to the general formula (I): (R 1 ) a G 3-a -Si-(-OSiG 2 ) n -(-OSiG b (R 1 ) 2-b ) m -O-SiG 3-a (R 1 ) a
  • G is hydrogen, phenyl, hydroxy, or C 1 -C 8 alkyl, preferably methyl;
  • a is 0 or an integer having a value from 1 to 3, preferably 1;
  • b is 0, 1 or 2, preferably 1;
  • n is a number from 0 to 1,999;
  • m is an integer from 0 to 1,999; the sum of n and m is a number from 1 to 2,000; a and m are not both 0;
  • R 1 is a monovalent radical conforming to the general formula CqH 2q L, wherein q is an integer having
  • Such highly preferred amino silicones can be called as terminal aminosilicones, as one or both ends of the silicone chain are terminated by nitrogen containing group.
  • the above aminosilicones when incorporated into the composition, can be mixed with solvent having a lower viscosity.
  • solvents include, for example, polar or non-polar, volatile or non-volatile oils.
  • oils include, for example, silicone oils, hydrocarbons, and esters.
  • preferred are those selected from the group consisting of non-polar, volatile hydrocarbons, volatile cyclic silicones, non-volatile linear silicones, and mixtures thereof.
  • the non-volatile linear silicones useful herein are those having a viscosity of from about 1 to about 20,000 centistokes, preferably from about 20 to about 10,000 centistokes at 25°C.
  • non-polar, volatile hydrocarbons especially non-polar, volatile isoparaffins
  • Such mixtures have a viscosity of preferably from about 1,000mPa ⁇ s to about 100,000mPa ⁇ s, more preferably from about 5,000mPa ⁇ s to about 50,000mPa ⁇ s.
  • alkylamino substituted silicone compounds include those having alkylamino substitutions as pendant groups of a silicone backbone. Highly preferred are those known as "amodimethicone". Commercially available amodimethicones useful herein include, for example, BY16-872 available from Dow Corning.
  • the silicone compounds may further be incorporated in the present composition in the form of an emulsion, wherein the emulsion is made my mechanical mixing, or in the stage of synthesis through emulsion polymerization, with or without the aid of a surfactant selected from anionic surfactants, nonionic surfactants, cationic surfactants, and mixtures thereof.
  • composition of the present invention may include other additional components, which may be selected by the artisan according to the desired characteristics of the final product and which are suitable for rendering the composition more cosmetically or aesthetically acceptable or to provide them with additional usage benefits.
  • additional components generally are used individually at levels of from about 0.001% to about 10%, preferably up to about 5% by weight of the composition.
  • a wide variety of other additional components can be formulated into the present compositions. These include: other conditioning agents such as hydrolysed collagen with tradename Peptein 2000 available from Hormel, vitamin E with tradename Emix-d available from Eisai, panthenol available from Roche, panthenyl ethyl ether available from Roche, hydrolysed keratin, proteins, plant extracts, and nutrients; preservatives such as benzyl alcohol, methyl paraben, propyl paraben and imidazolidinyl urea; pH adjusting agents, such as citric acid, sodium citrate, succinic acid, phosphoric acid, sodium hydroxide, sodium carbonate; coloring agents, such as any of the FD&C or D&C dyes; perfumes; and sequestering agents, such as disodium ethylenediamine tetra-acetate; ultraviolet and infrared screening and absorbing agents such as benzophenones; and antidandruff agents such as zinc pyrithione.
  • compositions of the present invention can be in the form of rinse-off products or leave-on products, and can be formulated in a wide variety of product forms, including but not limited to creams, gels, emulsions, mousses and sprays.
  • the composition of the present invention is especially suitable for hair conditioners especially rinse-off hair conditioners.
  • composition of the present invention is preferably used for a method of conditioning hair, the method comprising following steps:
  • Effective amount herein is, for example, from about 0.1ml to about 2ml per 10g of hair, preferably from about 0.2 ml to about 1.5ml per 10g of hair.
  • composition of the present invention provides improved conditioning benefits, especially improved wet conditioning benefits after rinsing and improved dry conditioning, while maintaining wet conditioning benefit before rinsing.
  • the composition of the present invention may also provide improved product appearance to consumer.
  • a reduced dosage of the composition of the present invention may provide the same level of conditioning benefits as those of a full dosage of conventional conditioner compositions. Such reduced dosage herein is, for example, from about 0.3ml to about 0.7ml per 10g of hair.
  • compositions (wt%)
  • Components 1-7 are mixed and heated to from about 66°C to about 85°C to form an oil phase.
  • Components 8-10 are mixed and heated to from about 20°C to about 48°C to form an aqueous phase.
  • Becomix® direct injection rotor-stator homogenizer the oil phase is injected and it takes 0.2 second or less for the oils phase to reach to a high shear field having an energy density of from 1.0x10 5 J/m 3 to 1.0x10 7 J/m 3 where the aqueous phase is already present.
  • the temperature of the gel matrix when formed is from about 20°C to about 37°C. A gel matrix is formed. If included, Components 11-14 are added to the gel matrix with agitation. Then the composition is cooled down to room temperature.
  • Components 1-7 are mixed and heated to from about 66°C to about 85°C to form an oil phase.
  • Components 8-10 are mixed and heated to from about 20°C to about 48°C to form an aqueous phase.
  • Becomix® direct injection rotor-stator homogenizer the oil phase is injected and it takes 0.2 second or less for the oils phase to reach to a high shear field having an energy density of from 1.0x10 5 J/m 3 to 1.0x10 7 J/m 3 where the aqueous phase is already present.
  • the temperature of the gel matrix when formed is from about 44°C. A gel matrix is formed. If included, Components 11-14 are added to the gel matrix with agitation. Then the composition is cooled down to room temperature.
  • Components 1-10 are mixed with agitation, and heated to about 80°C. The mixture is cooled down to about 55°C and gel matrix is formed. If included, Components 11-14 are added to the gel matrix with agitation. Then the mixture is cooled down to room temperature.
  • compositions For some of the above compositions, properties and conditioning benefits are evaluated by the following methods. Results of the evaluation are also shown above.
  • the embodiments disclosed and represented by "Ex. 1" through “Ex. 3” are hair conditioning compositions made by the method of the present invention which are particularly useful for rinse-off use. Such embodiments have many advantages. For example, they effectively transform to emulsions, and provides wet conditioning benefit.
  • Syneresis is evaluated by direct visual evaluation of water amount on to the surface of the composition, after the storage at 5°C for 2 months. Improved stability of the emulsion structure causes less water being squeezed out from the composition.
  • Thick feel is evaluated by panelists, by touching a hair sample after applying 10ml compositions.
  • Rheology consistency is evaluated by differences in rheology (% difference in rheology between minimum and maximum rheologies) by repeated manufacturing of the same composition. Compositions having a lower % difference is considered to have more consistency compared to those having a higher % difference.

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Claims (9)

  1. Procédé de préparation d'une composition de soin personnel,
    dans lequel la composition comprend : un système d'agents tensioactifs cationiques ; un composé gras à point de fusion élevé ayant une température de fusion d'au moins 25 °C; et un véhicule aqueux,
    dans lequel le système d'agents tensioactifs cationiques comprend un agent tensioactif cationique de sel d'ammonium quaternaire mono-alkylique possédant une longue chaîne alkyle de 12 à 30 atomes de carbone et un agent tensioactif cationique di-alkylique possédant deux longues chaînes alkyle de 12 à 30 atomes de carbone ; et
    dans lequel le procédé comprend les étapes suivantes :
    (1) la préparation d'une phase huileuse comprenant l'agent tensioactif et le composé gras à point de fusion élevé, dans lequel la température de la phase huileuse est supérieure à un point de fusion du composé gras à point de fusion élevé ; et
    (2) la préparation d'une phase aqueuse comprenant le véhicule aqueux, dans lequel la température de la phase aqueuse est inférieure au point de fusion du composé gras à point de fusion élevé ; et
    (3) le mélange de la phase huileuse et de la phase aqueuse pour former une émulsion ;
    dans lequel l'étape de mélange (3) comprend les étapes détaillées suivantes :
    (3-1) l'introduction de l'une ou l'autre de la phase huileuse ou de la phase aqueuse dans un champ à cisaillement élevé ayant une densité d'énergie de 1,0 × 102 J/m3 ou plus ;
    (3-2) l'introduction de l'autre phase directement dans le champ ; et
    (3-3) la formation d'une émulsion ;
    dans lequel l'étape de mélange (3) est effectuée en utilisant un homogénéiseur comportant un élément rotatif ;
    dans lequel la phase huileuse contient 0 % à 50 % du véhicule aqueux, en poids de la phase huileuse ; et
    dans lequel la température de l'émulsion lors de sa formation va de 10 °C à 40 °C.
  2. Procédé selon la revendication 1, dans lequel l'étape de mélange (3) comprend les étapes détaillées suivantes :
    (3-1) l'introduction de la phase aqueuse dans un champ à cisaillement élevé ayant une densité d'énergie de 1,0 x 102 J/m3 ou plus ;
    (3-2) l'introduction de la phase huileuse directement dans le champ ; et
    (3-3) la formation d'une émulsion.
  3. Procédé selon la revendication 1, dans lequel le champ à cisaillement élevé a une densité d'énergie de 1,0 x 103 J/m3.
  4. Procédé selon la revendication 1, dans lequel les deux phases atteignent le champ à cisaillement élevé en 0,52 seconde ou moins, après leur première rencontre.
  5. Procédé selon la revendication 1, dans lequel l'homogénéiseur comportant un élément rotatif est un homogénéiseur à rotor/stator.
  6. Procédé selon la revendication 1, dans lequel la teneur en eau de la phase huileuse va jusqu'à 40 % en poids de la phase huileuse.
  7. Procédé selon la revendication 1, dans lequel la teneur en eau de la phase huileuse va jusqu'à 25 % en poids de la phase huileuse.
  8. Procédé selon la revendication 1, dans lequel l'émulsion est une matrice de gel comprenant un agent tensioactif cationique, un composé gras à point de fusion élevé et un véhicule aqueux.
  9. Procédé selon la revendication 8, dans lequel le rapport pondéral de l'agent tensioactif cationique et du composé gras à point de fusion élevé se situe dans la gamme de 1:1 à 1:4.
EP12769242.4A 2011-09-15 2012-09-14 Procédé de préparation d'une composition de soins personnels comprenant un système tensioactif et un composé gras à point de fusion élevé Active EP2755627B1 (fr)

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PCT/US2012/055375 WO2013040331A2 (fr) 2011-09-15 2012-09-14 Procédé de préparation d'une composition de soins personnels comprenant un système tensioactif et un composé gras à point de fusion élevé

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BR112014005645B1 (pt) 2019-03-19
WO2013040331A2 (fr) 2013-03-21
CA2846618A1 (fr) 2013-03-21
CN103826601A (zh) 2014-05-28
US20130071346A1 (en) 2013-03-21
WO2013040331A3 (fr) 2014-03-27
BR112014005645A2 (pt) 2017-03-28
JP2014526477A (ja) 2014-10-06
JP5912183B2 (ja) 2016-04-27
MX2014003232A (es) 2014-06-05
EP2755627A2 (fr) 2014-07-23
MX346869B (es) 2017-03-24
CA2846618C (fr) 2017-04-18
ES2713964T3 (es) 2019-05-24
CN108078797A (zh) 2018-05-29
US10695274B2 (en) 2020-06-30

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